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Gear Blanks for the Wings3d 3d Modeler
The following gear blanks for the Wings3d modeler and are provided free of charge with no restrictions of use. They're intended for 3d prints or illustration. While every effort has been made to ensure accuracy I make no guarantees as to their use for any particular purpose.
USE AT YOUR OWN RISK.
The following gear blanks all have a pitch diameter of 10 Wings3d Units. To make a pair, for example a 61 tooth and a 15 tooth. Circular pitch = Pitch Diameter*PI/61=0.515015. The 15 tooth gear has to have the same circular pitch. 15*0.515015/PI=2.45902 this is the pitch diameter of the 15T gear. This image shows the meshing of the two gears. To scale the 15T gear do a RMB radial scale in Wings3d using the centre vertex at 24.5902%. There is no clearance built in to the models. If you need clearance you'll need to do it yourself.

If you're making a matching rack you'll need the addendum and dedendum. The addendum in this case and always (afaik) is the pitch diameter/number of teeth. The dedendum for the gears below is 1.25*addendum.

Addendum = the tooth depth outside the pitch circle diameter.
Dedendum = the tooth depth inside the pitch circle diameter.

It might be necessary to do some further smoothing of the models depending on the intended use. I suggest smoothing just the peripheral faces rather than smoothing the whole body as the front and back faces are flat.

If you need a gear with a higher tooth count I'll add it to the list. Use the contact form link at the head of this page to request a special.

Untested but you can make helical gears with a bit of work. Divide the peripheral edges into a suitable number creating edge loops. After working out the angle successively rotate each edge loop.

25░ Pressure angle gears
12 13 14 15 16 17 18 19 20 21 22
23 24 25 26 27 28 29 30 31 32 33
34 35 36 37 38 39 40 41 42 43 44
45 46 47 48 49 50 51 52 53 54 55
56 57 58 59 60 61          

20░ Pressure angle gears
Gears 12:17 have been undercut which avoids interference but reduces the strength of the teeth.
12 13 14 15 16 17        
18 19 20 21 22 23 24 25 26 27 28
29 30 31 32 33 34 35 36 37 38 39
40 41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60 61
62 63 64 65 66 67 68 69 70 71 72
73 74 75 76 77 78 79 80 81 82 83
84 85 86 87 88 89 90        

And - for something a little different!
Guitar Repairs and Custom Building:
Guitar repairs and custom builds by Ged Green logo Master luthier services and guitar repairs in the UK.
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